Are these old Gillette Razor Blades found in my garage a treasure?

I found these at the bottom of an old pickle jar filled with old screws and nails.

Our plan is to downsize which means cleaning out rooms and our garage which has been a catch all for all kinds of stuff, including items I inherited when my mother died.  My mom was a saver.  One of the items was a big pickle jar filled with old screws and nails and in the bottom was a pack of old Gillette Razor Blades.  

It has been decades since I've shaved.  And when I did I usually used an electric razor.  Check these pictures.  Are these old?  Worth saving?  They look almost antique, a little piece of Americana.